Discussion of Method for Computing Temperature Load during Operation Period on High Arch Dam

2013 ◽  
Vol 470 ◽  
pp. 976-979
Author(s):  
Zhi Qiang Wang ◽  
Xiao Bin Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Temperature Difference ◽  
Standard Method ◽  
Arch Dam ◽  
High Arch Dam ◽  
Linear Temperature ◽  
Temperature Load ◽  
Operation Period ◽  
Element Method

According to the existing arch dam design specification, the temperature load is obtained based on analytic solution of infinite long free plate, it only considers the average temperature and the equivalent linear temperature difference of dam section in operation period, the influence of non-linear temperature difference has not been considered. This kind of simplification has some approximation; especially it can not reflect spatial effect of larger temperature gradient changes in the upstream and downstream water level change area. This paper first takes the free plate as an example, has calculated the temperature field corresponding to analytical method, finite element method, standard method, explains the rationality of using written program to carry on finite element analysis. On this basis, take Xiluodu arch dam as an example, the dam temperature load and temperature stress has been analyzed by using finite element method and standard method, the difference between both has been discussed

Study on Mechanism of Crack on Upstream Surface of Super-High Arch Dam

2013 ◽  
Vol 438-439 ◽  
pp. 1325-1328
Author(s):  
Jun Feng Guan ◽  
Long Bang Qing ◽  
Juan Wang ◽  
Wei Feng Bai ◽  
Yu Hu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Concentration ◽  
Three Dimensional ◽  
Arch Dam ◽  
High Arch Dam ◽  
Transverse Joint ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Method

A kind of crack with similar characteristics has been discovered on the upstream surface of super-high arch dam. In this paper, the reason of cracking was analyzed by the three-dimensional finite element method. It is found that the stress concentration of concrete near the water-stop structure led to the concrete initial cracking in the process of transverse joint open.

Sensitivity Analysis of Transient Load for Arch Dam Base on Finite Element Method

2014 ◽  
Vol 501-504 ◽  
pp. 1857-1862
Author(s):  
Xue Lu ◽  
Zhi Min Su ◽  
Feng Wang ◽  
Zhi Fang Tian ◽  
Jian Bing Zhu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Tensile Stress ◽  
Water Level ◽  
Maximum Tensile Stress ◽  
Arch Dam ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
Temperature Load ◽  
Element Method

Based on theories of finite element method, universal software ANSYS, by use of common software ANSYS as a platform, the influence degrees of transient temperature load and reservoir water load on arch dam stress are analyzed and computed. The result indicates that when the water level is same, the maximum tensile stress on arch dam has a close correlation with the variation of temperature, and the sensitivity of maximum tensile stress of arch dam for water temperature is higher than air temperature. The maximum tensile stress on arch dam does not correlate well with reservoir water level changes when the temperature is same. Through the non-dimensional processing on influencing factors which are temperature load and reservoir water level, the sensitivity of maximum tensile stress on arch dam for reservoir water pressure is higher than temperature load.

Study of Stability against Up-Sliding of High Arch Dam

2011 ◽  
Vol 71-78 ◽  
pp. 41-45
Author(s):  
Fu Wei Xu ◽  
Hai Yu Chen
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Arch Dam ◽  
High Arch Dam ◽  
Double Curvature ◽  
Element Method

Aimed at stability against up-sliding that the dam engineers have concerned closely, in this paper combining two models of arch dam, the analysis of 3-D finite element method has been carried out about shear of contact face between foundation and high arch dam, we concluded probability of stability against up-sliding along contact face between foundation and high double curvature arch dam was little, but the problem of stability against up-sliding at high single curvature arch dam was existed, so we should study its stability against up-sliding.

scholarly journals Integrating the Finite Element Method with a Data-Driven Approach for Dam Displacement Prediction

2020 ◽  
Vol 2020 ◽  
pp. 1-16 ◽  
Author(s):  
Chenfei Shao ◽  
Chongshi Gu ◽  
Zhenzhu Meng ◽  
Yating Hu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Elastic Modulus ◽  
Random Coefficient ◽  
Arch Dam ◽  
Data Driven ◽  
The Finite Element Method ◽  
Random Coefficient Model ◽  
Proposed Model ◽  
Element Method

Both numerical simulations and data-driven methods have been applied in dam’s displacement modeling. For monitored displacement data-driven methods, the physical mechanism and structural correlations were rarely discussed. In order to take the spatial and temporal correlations among all monitoring points into account, we took the first step toward integrating the finite element method into a data-driven model. As the data-driven method, we selected the random coefficient model, which can make each explanatory variable coefficient of all monitoring points following one or several normal distributions. In this way, explanatory variables are constrained. Another contribution of the proposed model is that the actual elastic modulus at each monitoring point can be back-calculated. Moreover, with a Lagrange polynomial interpolation, we can obtain the distribution field of elastic modulus, rather than gaining one value for the whole dam in previous studies. The proposed model was validated by a case study of the concrete arch dam in Jinping-I hydropower station. It has a better prediction precision than the random coefficient model without the finite element method.

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